Mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions.

This is a difficult problem. I wish I _______ the answer.

Mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions.

It's good _______ a glass of warm water immediately after you wake up in the morning.

Mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions.

His mother is very proud of him, _______ she?

Mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions.

Peter_______ have lunch in the school canteen when he was in grade 6.

Mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions.

Traffic _______ in Vietnam usually occur in such big cities as Hanoi and Ho Chi Minh City.

Mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions.

Tuan is a good student. He always answers the teacher's questions very _______.

Mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions.

The first Earth Day was held _______ April 22, 1970.

Mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions.

We _______ each other at my aunt's house three years ago and _______ friends ever since.